[ECOS] Problem opening second serial port on EB40A

["Sidharth Jandhyala" <sidharth at clarinox dot com>]

Hello,

 

I am having trouble using the second serial port on the eb40A. Let me
explain my setup

 

1)      I have built a configuration using the graphical tool with the
following settings (default package)

 

CYGDAT_IO_SERIAL_TTY_CONSOLE = "/dev/ttydiag"

CYGDAT_IO_SERIAL_TTY_TTY0_DEV = "/dev/ser0"

CYGDAT_IO_SERIAL_TTY_TTY1_DEV = "dev/ser1"

 

2)      I have serial A of the board connected to arm-elf-gdb

3)      I have serial B of the board connected to another computer running
hyperterminal

4)      My sample hello world program is shown below

 

 

/*-------------------------------------CODE STARTS
HERE---------------------------------*/

#include <stdio.h>                      /* printf */

#include <string.h>                     /* strlen */

#include <cyg/kernel/kapi.h>            /* All the kernel specific stuff */

#include <cyg/io/io.h>                  /* I/O functions */

#include <cyg/hal/hal_arch.h>           /* */

#include <pkgconf/hal.h>

#include <cyg/infra/cyg_type.h>         // base types

#include <cyg/hal/hal_io.h>             // low level i/o

#include <cyg/hal/var_io.h>             // common registers

#include <cyg/hal/plf_io.h>

#include <cyg/io/serialio.h>

#include <cyg/io/io_diag.h>

 

 

int main (void)

{

    cyg_io_handle_t serialA;

    Cyg_ErrNo errA;

    cyg_io_handle_t serialB;

    Cyg_ErrNo errB;

 

    const char test_string[] = "serial A  is working correctly!\n";

    const char test_string2[] = "serial B is working correctly\n";

    cyg_uint32 len = strlen(test_string);

    cyg_uint32 len2 = strlen(test_string2);

 

    printf("Starting serial example\n");

 

    errA = cyg_io_lookup( "/dev/haldiag", &serialA );

    if (ENOERR == errA)

    {

    printf("Found /dev/haldiag. Writing string....\n");

    }

 

    errB = cyg_io_lookup( "/dev/ser1", &serialB );

    if (ENOERR == errB)

    {

        printf("Found /dev/ser1 Writing string....\n");

    }

 

    for (;;)

    {

      write to serial port */

      errA = cyg_io_write( serialA, test_string, &len );

      errB = cyg_io_write(serialB, test_string2, &len2);

      hal_at91_led_on(0xffffffff);

      cyg_thread_delay(100);

      hal_at91_led_off(0xffffffff);

      cyg_thread_delay(100);

    }

 

}  //End main

 

/*-------------------------------------CODE ENDS
HERE---------------------------------*/

 

 

When I run the program I see the message  "serial A is working correctly" on
the console and all the LEDs flash on and off. However, I see no message of
any kind in hyperterminal.

 

Debugging reveals that errB = -2 ("No such entity" as described by
codes.h").

 

What have I done wrong? I am a bit confused at what exactly haldiag does? 

 

I have seen a similar mail to this in the mailing list
http://sources.redhat.com/ml/ecos-discuss/2001-04/msg00466.html but this did
not shed any light on my problem.

 

Any help on this would be greatly appreciated. Thanks in advance.

 

Regards,

 

 

Sidharth



-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss